对空间数据进行查询提取，生成新数据集，并建立空间索引，python脚本，基于SuperMap开发-Query spatial data extraction to generate new data set, and the establishment of a spatial index, python scr ipt, based on SuperMap development

图像融合中的平均梯度、相关系数、信息熵、交叉熵、联合熵、均方误差、互信息、信噪比、峰值信噪比、均方根误差、空间频率、标准差、均值、扭曲程度、偏差指数等等(Evaluation indexes average gradient, correlation coefficient, entropy, cross entropy, joint entropy, mean square error, mutual information, signal-to-noise ratio, peak sign

空间数据库，包括格网索引与查询的实现，属性查询的事先(Spatial database in C++ example made by wuhan university including grid index and attribute index)

计算Moran指数，主要用于截面数据，用于分析空间相关性的代码，空间计量经济学的一部分。(The Moran index is calculated, mainly used for cross section data, for the analysis of spatial correlation code, and part of the spatial econometrics.)

Z指数广泛应用于中国南方地区旱涝时空演变特征识别中，Z指数的计算只需要降水资料，且不受地域、时间尺度的局限，适用于多时间尺度的旱涝定量研究。文件为Z指数的MATLAB编写程序。(Z index is widely used in the spatial and temporal evolution of drought and flood in southern China. The calculation of Z index only needs precipitation data and